Post black reformatting

Applied on top of a pure run of black -l 79 in
I7eda77fed3d8e73df84b3651fd6cfcfe858d4dc9,  this set of changes
resolves all remaining flake8 conditions for those codes
we have enabled in setup.cfg.

Included are resolutions for all remaining flake8 issues
including shadowed builtins, long lines, import order, unused
imports, duplicate imports, and docstring issues.

Change-Id: I4f72d3ba1380dd601610ff80b8fb06a2aff8b0fe

1 files changed, 8 insertions, 7 deletions

diff --git a/lib/sqlalchemy/dialects/postgresql/dml.py b/lib/sqlalchemy/dialects/postgresql/dml.py
index 825f13238..9698e36ba 100644
--- a/lib/sqlalchemy/dialects/postgresql/dml.py
+++ b/lib/sqlalchemy/dialects/postgresql/dml.py
@@ -5,14 +5,15 @@
 # This module is part of SQLAlchemy and is released under
 # the MIT License: http://www.opensource.org/licenses/mit-license.php
 
-from ...sql.elements import ClauseElement, _literal_as_binds
+from . import ext
+from ... import util
+from ...sql import schema
+from ...sql.base import _generative
 from ...sql.dml import Insert as StandardInsert
+from ...sql.elements import ClauseElement
 from ...sql.expression import alias
-from ...sql import schema
 from ...util.langhelpers import public_factory
-from ...sql.base import _generative
-from ... import util
-from . import ext
+
 
 __all__ = ("Insert", "insert")
 
@@ -51,7 +52,7 @@ class Insert(StandardInsert):
         set_=None,
         where=None,
     ):
-        """
+        r"""
         Specifies a DO UPDATE SET action for ON CONFLICT clause.
 
         Either the ``constraint`` or ``index_elements`` argument is
@@ -70,7 +71,7 @@ class Insert(StandardInsert):
          Additional WHERE criterion that can be used to infer a
          conditional target index.
 
-        :param set_:
+        :param set\_:
          Required argument. A dictionary or other mapping object
          with column names as keys and expressions or literals as values,
          specifying the ``SET`` actions to take.